Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22ebade52e6c3b38b7506c631051bffab7b1b84bca744fbe08d52cedd2ca92e9' 
  AND token = '4gnXUCzI+vrDB1xOiq73NJfm5lzkforgtoCqrxW5m3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}